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| Study on Suitable Acidity Conditions for Determination of Zinc Content by Coordination Titration |
| Received:October 25, 2021 Revised:October 31, 2021 |
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| DOI：10.3969/j.issn.2095-1035.2022.03.022 |
| KeyWord:coordination titration; Zinc ion;titration error;acidity conditions; |
| Author | Institution |
| SU tiejun |
长江大学工程技术学院 |
| XIA Jinqiang |
长江大学工程技术学院 |
| Li Kee |
长江大学信息与数学学院 |
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| Abstract: |
| Adjusting the pH value of the system to be measured is an important selective titration method in coordination titration. The titration error under different acidity conditions was calculated by CTE1.0 program, and the content of zinc in simulated samples and commercial drugs was determined by coordination titration. The calculated and measured results show that the suitable acidity condition for the determination of zinc ion content in the system without calcium ion is pH = 6; In the mixed ionic solution of calcium and zinc, the appropriate acidity condition for the determination of zinc content is pH = 5. The relative standard error of parallel determination experiment is 1.63%, and the recovery is 99.1% - 101.8%. |
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